Analysis of series-connected wound-rotor self-excited induction generator

Mostafa, Alaa R.; Mohamadein, A.L.; Rashad, Essam M.

doi:10.1049/ip-b.1993.0041

Cited by 28 publications

(12 citation statements)

References 10 publications

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“…Further description on the bicubic spline was not found. It can be seen that the aim of our paper is different from the one from Lovatt and Stephenson [6]. The paper from Lovatt could have been included as the reference list of the paper; however, the coverage of the paper [6] is not bicubic spline and the circulation of the paper [6] is limited (not in IEEE Xplore); therefore, we have not cited the paper.…”

Section: Referencesmentioning

confidence: 97%

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Closure on “Simulation of Switched Reluctance Motor Drives Using Two-Dimensional Bicubic Spline”

Xue

Cheng

2004

IEEE Trans. On Energy Conversion

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I would like to comment on the paper by Xiang-Dang Xue et al., [1] The bicubic spline technique presented in this paper was first published in a reluctance motor context by Manzer et al., [2].Subsequently, the technique was improved upon by Stephenson and myself in [3].Both of these older papers discuss the more difficult task of fitting to measured data that may contain noise whereas the recent publication only discusses noise-free data. The second paper, in particular, shows how data can be smoothed. For example, to see the smoothing of the fitted surface, contrast Fig. 4 in [3] with (coincidentally) Fig. 4 in [1], the latter shows spurious high-frequency ripples.Also, the bicubic spline technique is well known in mathematical literature and available in standard math libraries (e.g., NAG).Despite the technique being well known in mathematical literature and previously published in the context of reluctance motors, I do not wish to suggest that the authors were in anyway trying to claim the work of others as their own. I would suggest that it was simply an oversight by the authors and that the authors were not aware of either the mathematical literature or motor literature on this subject. Without doubt, bicubic spline is mathematically a mature interpolation technique [2]. The bicubic spline function used in our paper is just based on [2]. Especially, we have pointed out in the last paragraph in Section II in our paper that detailed description of bicubic spline interpolation as seen in [2]. REFERENCESSpline interpolation is widely applicable to science and engineering and is a very efficient tool to precisely fit discrete data. Our paper cited two papers on cubic and bicubic splines in SRM field [3], [4]. In [3], the cubic spline was employed to represent the phase flux linkage/phase current curves for a set of discrete rotor position values. Reference [4] presented that the cubic spline is utilized to fit the experimental data of flux linkage/current and the bicubic spline interpolation is used to estimate the rotor position and the torque.It is clear that our paper has briefly presented previous related works on bicubic spline interpolation in mathematical and SRM fields. The contribution of our paper is 1) to explore how utilizing bicubic spline technique to accurately compute the flux linkage at arbitrary rotor position and current by use of a small quantity of the known data; 2) to investigate the effect of the number and distribution of the known data on the accuracy of the flux linkage interpolation computation; and 3) to apply the bicubic spline interpolation to simulating the SRM drive.It should be noticed that the nonlinear magnetic characteristics in SRM may be obtained from finite-element analysis or experiment on an existing motor, not only from experiment. Furthermore, no measurement noise will exist for finite-element method (FEM). Our paper is focused on accurately and rapidly computing the magnetic characteristics at arbitrary rotor position and current using the bicubic spline technique ...

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Section: Referencesmentioning

confidence: 97%

“…In Lovatt and Stephenson's paper [6], a measurement technique was described that can accurately determine both the flux linkage and torque for an SRM. It is claimed in their paper that a bicubic spline surface fitting routine from a standard library was used to smooth the captured data.…”

Section: Closure On "Simulation Of Switched Reluctance Motormentioning

confidence: 99%

Closure on “Simulation of Switched Reluctance Motor Drives Using Two-Dimensional Bicubic Spline”

Xue

Cheng

2004

IEEE Trans. On Energy Conversion

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“…A series-connected self-excited synchronous generator (SCSESG) is a wound-rotor induction machine in which the stator and rotor windings are connected in series, the phase sequences of the stator being opposite to that of the rotor [1]- [4]. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…A typical application is as a high-speed wind turbine generator for distributed generation [1]. Steadystate and transient D-Q theory have been used for analyzing this type of machine [2]- [4]. Performance of this type of machine based on field analysis, however, has not been attempted before.…”

Section: Introductionmentioning

confidence: 99%

Field Computation and Performance of a Series-Connected Self-Excited Synchronous Generator

2010

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This paper presents the field computation and the operating characteristics of a series-connected self-excited synchronous generator. Modeling for time-stepping coupled field-circuit analysis is explained. A detailed study on the selfexcitation phenomenon and load performance is presented. The proposed analysis is vigorously tested on a three-phase, 1.8-kW slip-ring induction machine for various operating conditions. The computed results obtained by the FEA are found to be in good agreement with experimental results.

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“…INTRODUCTION It has been proved previously that the process of electro-mechanical energy conversion is possible when stator and rotor windings of a wound rotor induction machine are connected in series [1]. An essential requirement has to be satisfied for successful operation; the phase sequence of the rotor magneto-motive force is in the reverse sense to that of the stator.…”

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confidence: 99%

Dynamic performance of series-connected wound rotor induction motor

Rashad

2010

2010 IEEE International Conference on Power and Energy

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Series-connected induction motor has the ability of operation either at two speeds; the first one is less than the synchronous speed depending on the load, while the second speed is exactly double the synchronous speed. The motor has the capability of self-starting to reach the first speed. In addition to special arrangements required to attain the second (higher) speed, instability problems have been noted in experimental operation. This paper presents a complete dynamic analysis of motor when supplied from a variable voltage variable frequency power supply. The starting behavior has been presented as well as frequency change for both no-load and loaded conditions. Experimental results are given to check model validity in dynamic conditions.

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Analysis of series-connected wound-rotor self-excited induction generator

Cited by 28 publications

References 10 publications

Closure on “Simulation of Switched Reluctance Motor Drives Using Two-Dimensional Bicubic Spline”

Closure on “Simulation of Switched Reluctance Motor Drives Using Two-Dimensional Bicubic Spline”

Field Computation and Performance of a Series-Connected Self-Excited Synchronous Generator

Dynamic performance of series-connected wound rotor induction motor

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